Attached earlobes are a dominant trait. Cross between two heterozygous parents for earlobe attachment (Ee X Ee). The expected phenotypic ratio is 3:1.
Earlobe attachment is a dominant trait. So the dominant allele is represented as 'E' and the recessive allele is represented as 'e'. The homozygous individual will have a genotype EE and the heterozygous individual is represented as Ee.The cross between two heterozygous individuals as parents (Ee×Ee) will give 1EE(homozygous dominant):2Ee(heterozygous dominant):1ee(homozygous recessive).
Phenotypic ratio means the ratio of the morphological appearance in the offsprings. So the phenotypic ratio in this case is 3 (dominant):1(recessive).
But if the phenotypic ratio if a heterozygous cross is 2:1, then it means that it has a lethal gene.
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What causes different illnesses and even premature death?
Smoking cigarettes and being exposed to secondhand tobacco smoke are leading causes of premature death.
death that occurs earlier than the typical death age for a population. The average death age is around 75 years old. The biggest causes of early death in the US are smoking cigarettes and being around people who smoke. They can make people more vulnerable to developing cancer, heart disease, stroke, lung disease, and a host of other illnesses. Injuries are another reason for early mortality.
Ischemic heart disease, which accounts for 16% of all fatalities worldwide, is the world's leading cause of mortality. This disease has shown the highest increase in deaths since 2000, with an increase of more than 2 million deaths to 8.9 million deaths in 2019. The second and third most common killers, stroke and chronic obstructive pulmonary disease, respectively account for 11% and 6% of all fatalities.
Lower respiratory infections remained to be the most fatal communicable disease worldwide, ranking as the fourth most common cause of death. However, there have been fewer fatalities; in 2019, it claimed 2.6 million lives, 460 000 fewer than it did in 2000.
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Which force acts between any two objects that have mass?
O A. Air resistance
O B. Gravity
O C. Friction
O D. Magnetic force
Answer:
magnetic force because it uses force and force has mass
What adaptations allow the same bacteria that live on Earth to live on the International Space Station (ISS)
In order to survive on the ISS, bacteria must be able to withstand the immense gravitational forces, exposure to radiation, lack of oxygen, and other environmental factors that are not present on Earth.
Fortunately, bacteria have evolved a variety of adaptations that allow them to survive and thrive in space.One of the most important adaptations for bacteria living on the ISS is the ability to survive in low-oxygen environments. The ISS has very low levels of oxygen, which are not conducive to most life forms. However, many bacteria have adapted to survive and reproduce in these conditions.
Bacteria have developed specialized metabolic pathways that enable them to use different sources of energy, such as carbon dioxide, sulphur, and nitrogen compounds, that are more abundant in the environment of the ISS than oxygen. This allows them to survive and reproduce in the low-oxygen environment of the ISS.
Bacteria have also developed the ability to tolerate the intense radiation exposure that is present on the ISS. Radiation can cause DNA damage and mutations, which can be fatal for bacteria. However, some bacteria have developed mechanisms to repair radiation-induced DNA damage, allowing them to survive and reproduce in the extreme environment of the ISS.
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HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
Answer:
B preciptation occurs
Explanation:
Many organisms, such as honeybees and livestock, have been domesticated for economic reasons. Which of the following best describes an unintended consequence of this practice
Domestication of many organisms, such as honeybees and livestock causes a decrease in the genetic diversity of the organisms.
Genetic diversity refers to the range of genetically different individuals that are present in the same species. Domestication is the process by which the wild animals as well as plants are adapted to the human environment.
Domestication of livestock and honeybees is often done for economic reasons. An unintended consequence of the process of domestication is the decrease in the genetic diversity of the species. This decreases leads to a decrease in the variation which reduces the survival advantage of these species.
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How do organs work together in the nervous system to allow a fish to react to stimuli in its environment?
A. External stimuli trigger signals that move through the gills to the gill filaments, which send signals to the brain.
B. The brain sends signals through the lymph nodes to the skin, where the muscles decide how to react.
C. The brain sends signals through the spinal cord, which sends signals to nerves in the central nervous system.
D. External stimuli trigger signals that move through the nerves to the brain, which processes the information.
Answer:
D. External stimuli trigger signals that move through the nerves to the brain, which processes the information.
Explanation:
The brain then sends signals through the spinal cord, which sends signals to nerves in the central nervous system. The muscles then decide how to react based on the signals from the central nervous system.
Explanation:
How do organs work together in the nervous system to allow a fish to react to stimuli in its environment?
A. External stimuli trigger signals that move through the gills to the gill filaments, which send signals to the brain.
B. The brain sends signals through the lymph nodes to the skin, where the muscles decide how to react.
C. The brain sends signals through the spinal cord, which sends signals to nerves in the central nervous system.
D. External stimuli trigger signals that move through the nerves to the brain, which processes the information.
Elena paints the back of the second aquarium it has a height of 1 3/4 feet the painted area is 5 5/6 square feet what is its length
Answer:
3 1/3 ft
Explanation:
You want to know the length of an area that totals 5 5/6 square feet and is 1 3/4 feet high.
AreaThe formula for the area of a rectangle is ...
A = LW
Filling in the given values, we have ...
5 5/6 = L·(1 3/4)
Solving for L gives ...
L = (35/6)/(7/4) = (35/6)(4/7) = 140/42 = 10/3 = 3 1/3
The length of the painted area is 3 1/3 feet.
__
Additional comment
You might be asked to write the answer as a fraction: 10/3, or as a decimal: 3.33. In the latter case, you may need to round to tenths: 3.3.
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Aaron has a spider plant that produces several plantlets. Aaron puts each plantlet in its own pot and gives the plantlets to several friends. 1. Identify what would cause some of the plantlets to grow better than others, 2. including examples of possible causes. 3. Explain how you know what the cause of variation must be. SOMEONE HELP ITS DUE IN LIKE 10 MIN
ok so, lighting, amount of water, type of soil, fertilizer, bugs, pesticides, water contamination, other chemicals. even pets, cats- lol hope that helped!
Natural selection produces change by allowing beneficial genes to recombine in
A. an individual organism.
B. all organisms within a population
C. only the first generation of offspring
D successive generations of offspring
Could a man with Type O be the father of a Type AB child? Explain.
Answer:
No, because someone with blood type O has the genotype OO because O is recessive. One parents would need one allele to be A and the other parent would need one allele to be B for the child to be AB. But the man does not have an A or B allele, so it is not possible for him to be the father of a child with blood type AB.
A clump of cells in someone's intestine is genetically different from cells elsewhere in his body. These intestine cells have a _______ mutation
A clump of cells in someone's intestine is genetically different from cells elsewhere in his body. These intestine cells have a somatic mutation.
Any mutation that occurs in a cell other than a gamete, germ cell, or gametocyte is called a somatic mutation. This includes any change in the DNA sequence of a somatic cell of a multicellular organism with dedicated reproductive cells.
Somatic mutations are not typically passed on to offspring in the same way that germline mutations can. Plants, which don't have a distinct germline, and animals that can reproduce asexually via mechanisms like budding, like the cnidarians of the genus Hydra, blur this distinction.
Even though somatic mutations are not passed on to the next generation, they can be found in any cell that divides from the original somatic cell. Accumulated somatic mutations are the root cause of many forms of cancer.
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Cobalamin, more commonly called vitamin B12, ______________________________. Question 50 options: is found abundantly in plant foods. when taken as a supplement, will increase metabolic functions, such as endurance performance. was one of the first parts of the B complex group to be discovered. is essential int he synthesis of DNA and in the development of red blood cells.
Cobalamin, or vitamin B12, is a water-soluble vitamin that is essential for human health. It is found abundantly in animal-derived foods, such as fish, meat, poultry, eggs, and dairy products, but it is not found in plant-based foods.
It is one of the first vitamins to be discovered and is part of the B-complex group of vitamins. Vitamin B12 plays a vital role in the synthesis of DNA, red blood cell development, and metabolic functions, such as endurance performance. When taken as a supplement, it can help to increase metabolic functions, such as endurance performance. It is also important for maintaining healthy nerve cells, as well as a healthy immune system.
Vitamin B12 deficiency can lead to anemia, fatigue, and cognitive decline. Therefore, it is important to ensure adequate intake of this essential vitamin, either through dietary sources or supplements. It is important to note that vitamin B12 is only found in animal-derived foods, so vegans and vegetarians should consider taking a vitamin B12 supplement to avoid deficiency.
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According to the passage, a water treatment plant
I. cleans water before it goes to your house
II. cleans the dirty water that leaves your house
III. fills up the reservoir when it does not rain enough
Answer:
cleans the dirty water that leaves your house
Explanation:
i looked it up
If you don't have access to clean bottled water, you can make your water safe to drink by boiling it. Boiling them is the most effective approach to get rid of harmful bacteria, viruses, and parasites. Add a dash of salt to each quart or liter of boiled water. Thus, option B is correct.
What water treatment plant cleans the dirty water?Any dirt, sand, dust, and other particles that fit inside the micron capacity of sediment filters are removed, along with any particulate matter that is visible. Also removed by sediment filters is turbidity in the water.
One of the most effective ways to cleanse water is with a RO Purifier. Reverse osmosis eliminates impurities by forcing water across a semipermeable membrane.
Therefore, cleans the dirty water that leaves your house.
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Coral reefs cover less than ___ of the ocean floor.
A)1%
B)2%
C)4%
D)3%
Answer:
c
Explanation:
HRLP I ONLY HAVE 2 MINUTES JUST PLEASE GIVE A SIMPLE ANSWER
Answer:
i also think fault lines hope it's helps you
How do relationships among organisms help ecosystems thrive? Provide at least 6 sentences.
Relationships among organisms play a vital role in maintaining the balance and stability of ecosystems. These relationships can be categorized into three main types: mutualism, commensalism, and competition.
In mutualism, both species involved in the relationship benefit. For example, many plants have mutualistic relationships with pollinators, such as bees. The plants provide nectar as a food source for the bees, while the bees help to pollinate the plants, allowing them to reproduce.
In commensalism, one species benefits from the relationship while the other is neither helped nor harmed. The relationship between cattle and cattle egrets is an example of commensalism. The egrets feed on insects stirred up by the cattle as they graze, while the cattle are not affected by the presence of the egrets.
In competition, two or more species compete for the same limited resource. This can lead to the evolution of unique adaptations that allow a species to better exploit a particular resource, which in turn can lead to greater biodiversity in an ecosystem.
Predator-prey relationships also play an important role in ecosystems by controlling population sizes and helping to maintain balance within the ecosystem. In addition, decomposers break down dead organic matter and recycle nutrients, making them available for other organisms to use.
In summary, relationships among organisms in an ecosystem are vital for maintaining balance and stability, and ultimately ensuring the survival of the ecosystem.
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PLS ANSWER THIS QUESTION ASAP! WORTH 40 POINTS!!
Answer:
This is all I've done because I'm not 100% sure about the other part
What type of reaction is seen when hydrogen peroxide is added to a microbial colony of catalase-producing bacteria
What type of reaction is seen when hydrogen peroxide is added to a microbial colony of catalase-producing bacteria is the rapid formation of gas bubbles.
Catalase is an enzyme that catalyzes the reaction in which hydrogen peroxide is broken down into water and oxygen This enzyme is able to oxidize 1 molecule of hydrogen peroxide to oxygen. Then simultaneously it can also reduce the second hydrogen peroxide molecule to water
Hydrogen peroxide is one of the breakdown products of every cell that uses oxygen as an energy source in metabolic processes. When hydrogen peroxide is added to microbial colonies it inhibits the growth of one bacterial species by another. Because this compound is added to catalase-producing bacteria, the catalase enzyme neutralizes the bactericidal effect by breaking the compound into water and oxygen or gas bubbles.
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Wolves are predators for hares. The wolf population increases. What happens next? O A. The birthrate of wolves decreases. B. The death rate of hares increases. O C. The hare population increases. O D. The birthrate of hares increases.
Answer:
B. the death rates of hares increases
Explanation:
when the predator population increases, the death rate of the prey population also increases
Species 2 has a symbiotic relationship with species 1. The populations of the two species are represented on the graph. What type of relationship do the two species have?
Answer:
parasitic
Explanation:
when species 2 population is higher, species 1 is lower, meaning that species 2 harms species 1.
Answer:
Parasitic relationship
Explanation:
The well being on one specie affects the other adversely.
What is meant by monohybrid cross?
A specific form of a cross between two species known as a monohybrid cross only combines one trait at a time. For example, a pea plant hybrid between a tall and a short pea plant. the monohybrid cross-tat The genotype ratio under Mendelian inheritance is 1:2:1.
Two homozygous individuals with the opposing phenotype for a certain genetic trait make up a monohybrid cross.
A cross between two monohybrid features (TT and tt) is referred to as a monohybrid cross. One gene is passed on by the monohybrid cross. Using Punnett Square makes it straightforward to show. To examine the expression of heterozygous genes transferred from parents to homozygous offspring, geneticists use monohybrid crosses. For the monohybrid cross, Mendel first used a pair of pea plants with two unique traits: one tall and the other dwarf. Through the cross-pollination of tall and dwarf plants, tall plants were created. Each hybrid plant was quite tall. He referred to this generation as the first hybrid generation, and his offspring were designated as Filial1 or F1 progeny (F1). He conducted an experiment with each of the seven dissimilar pairs and discovered that all of the F1 offspring had the same pattern of behavior, acting just like one of the parents. There was not even one other parent character.
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An example of an infectious disease is:
1-sickle cell anemia
2-small pox
3-Down syndrome
4-diabetes
Which force is a contact force?
Answer:
B)A magnet pulling
hope it helps.
What’s the answer to the question
Answer:
Homologous Structures
What’s the correct answer , I’m not sure
Answer:
b i beleive
Explanation:
Need help on this and happy Mother’s Day spread some love to your mom
Answer:
I don't remember the answer for the first one but for the others
2nd question : homogenous and Dominate
3rd question: heterozygous
4th question : homogenous and Recessive
Explanation:
Ideal conditions for potato juice and hydrogen peroxide( your thoughts?)
Answer:
Preferably a well ventilated area, or someplace cool.
Which property of water makes it helpful to use in car radiators?
Answer:
Specific heat capacity is the property of water that makes it useful in car radiators.
Explanation:
Water has a high specific heat capacity. So it is used as a coolant in car radiators and helps maintain temperature of car engines.
Please help due today I’ll mark brainliest
Mutations can have_____
Explanation:
Mutation can result in many different types of change in sequences. Mutations in genes can have no effect, alter the product of a gene, or prevent the gene from functioning properly or completely. Mutations can also occur in nongenic regions.